Water Science and Engineering 2008, 1(3) 1-15  DOI:   10.3882/J.ISSN.1674-2370.2008.03.001   ISSN: 1674-2370 CN: 32-1785/TV

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distributed hydrologic model
forest wetland
soil moisture
Gen-wei CHENG
Zhong-bo YU
Chang-sheng LI
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Integrated simulation of runoff and groundwater in forest wetland watersheds

Gen-wei CHENG1;Zhong-bo YU2,3;Chang-sheng LI4;Yong HUANG2,3

1. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, P. R. China
2. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, P. R. China
3. Department of Geoscience, University of Nevada Las Vegas, Las Vegas, NV 89154, U.S.A.
4. Institute for the Study of Earth, Oceans and Space, University of New Hampshire, Durham, NH 03824, U.S.A.


A Distributed Forest Wetland Hydrologic Model (DFWHM) was constructed and used to examine water dynamics in the different climates of three different watersheds (a cold region, a sub-tropic region, and a large-scale watershed). A phenological index was used to represent the seasonal and species changes of the tree canopy while processes of snow packing, soil freezing, and snow and ice thawing were also included in the simulation. In the cold region, the simulated fall of the groundwater level in winter due to soil freezing and rise in spring due to snow and ice melting compare well with the observed data. Because the evapotranspiration and interaction of surface water and groundwater are included in the model, the modeled seasonal trend of the groundwater level in the sub-tropic region is in agreement with observations. The comparison between modeled and observed hydrographs indicates that the simulations in the large-scale watershed managed to capture the water dynamics in unsaturated and saturated zones.

Keywords distributed hydrologic model   forest wetland   runoff   soil moisture   groundwater  
Received 2008-08-03 Revised 2008-09-09 Online:  
DOI: 10.3882/J.ISSN.1674-2370.2008.03.001
Corresponding Authors: Zhong-bo YU
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